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. 2017 May 12;5(5):2325967117704186. doi: 10.1177/2325967117704186

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© The Author(s) 2017

This article is distributed under the terms of the Creative Commons Attribution-NonCommercial-NoDerivs 3.0 License (http://www.creativecommons.org/licenses/by-nc-nd/3.0/) which permits non-commercial use, reproduction and distribution of the work as published without adaptation or alteration, without further permission provided the original work is attributed as specified on the SAGE and Open Access pages (https://us.sagepub.com/en-us/nam/open-access-at-sage).

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Figure 2. — (A-E) Longitudinal ultrasonogram of the common extensor tendon (CET) illustrating grading of color Doppler activity from grade 0 to 4. The grading was performed in the region of interest (ROI), defined as a 0.5-cm longitudinal part of the tendon with maximum color Doppler activity. A horizontal yellow line measuring 0.5 cm marks the superficial border of the ROI, white dashed lines mark the proximal and distal borders, and the bone marks the deep border. (A) Grade 0: no activity. (B) Grade 1: single vessel in the ROI. (C) Grade 2: Doppler activity in less than 25% of the ROI. (D) Grade 3: Doppler activity in 25% to 50% of the ROI. (E) Grade 4: Doppler activity in more than 50% of the ROI.